People have to be realistic about this and do a reasonable cost benefit analysis.
The simple fact is that long range fixed wing SAR assets are a stupid waste of money if the SAR capability is anything other than a fortunate add on to a military capability for example the Nimrod.
In medicine, NICE makes judgements as to whether the cost of the medicine/operation is worth it.
In other words, there is a price on life, and long range SAR doesn't even come close to making economic sense. If you want to save lives, use the same money and build hospitals and you would save an order of magnitude more lives.
Incidentally, rotary SAR is also silly for the same reasons, but not quite as bad.